2nd/10_Wiki/Topics/AI_and_ML/Drama Management Systems.md

---
id: wiki-2026-0508-drama-management-systems
title: Drama Management Systems
category: 10_Wiki/Topics
status: verified
canonical_id: self
aliases: [drama manager, narrative AI, DM, story generation, interactive narrative]
duplicate_of: none
source_trust_level: A
confidence_score: 0.9
verification_status: applied
tags: [game-design, narrative, drama-management, interactive-narrative, ai, story-generation]
raw_sources: []
last_reinforced: 2026-05-10
github_commit: pending
tech_stack:
  language: Game Design
  applicable_to: [Interactive Narrative, Game AI, LLM Story]
---

# Drama Management Systems

## 매 한 줄
> **"매 game 의 author 의 intended pacing / arc 의 maintain 의 AI"**. 매 player agency ↔ author intent 의 tension 의 mediate. 매 famous: Façade (Mateas & Stern), Storytron (Crawford), Left 4 Dead AI Director. 매 modern: 매 LLM 의 dynamic story.

## 매 핵심

### 매 motivation
- **Plot vs play**: 매 player 의 freedom + author 의 arc.
- **Pacing**: 매 tension curve 의 maintain.
- **Coherence**: 매 character / setting 의 consistent.

### 매 famous example
- **Façade** (Mateas & Stern, 2005): 매 ABL behavior + plot points.
- **Storytron** (Crawford): 매 character-driven.
- **Left 4 Dead Director** (Valve): 매 pacing + drama.
- **AI Dungeon**: 매 GPT-driven.
- **Inkle (Heaven's Vault, 80 Days)**: 매 ink narrative scripting.

### 매 architecture pattern
- **Plot-point manager**: 매 must-hit beat.
- **Character authority**: 매 NPC autonomy.
- **Pacing controller**: 매 tension curve.
- **Coherence guardian**: 매 contradiction 의 detect.

### 매 method
- **Search-based** (Roberts/Riedl): 매 plot tree 의 search.
- **Beat-based**: 매 narrative beat 의 sequence.
- **Constraint-based**: 매 author intent 의 constraint.
- **LLM-based**: 매 token 의 narrative.

### 매 응용
1. **RPG**: 매 quest pacing.
2. **Interactive fiction**: 매 plot.
3. **Sim**: 매 emergent story.
4. **Educational**: 매 lesson narrative.
5. **VR experience**: 매 presence + arc.

## 💻 패턴

### Plot-point manager
```python
class PlotPointManager:
    def __init__(self, plot_points):
        self.points = plot_points  # 매 ordered required events
        self.completed = []
    
    def hint(self, world_state):
        """매 next required point 의 condition 의 nudge."""
        for p in self.points:
            if p not in self.completed and p.preconditions(world_state):
                return p.suggest_nudge(world_state)
        return None
    
    def mark_complete(self, point):
        self.completed.append(point)

# 매 example
plot = [
    PlotPoint('meet_mentor', preconditions=lambda w: w.location == 'tavern'),
    PlotPoint('learn_skill', preconditions=lambda w: 'meet_mentor' in w.events),
    PlotPoint('confront_villain', preconditions=lambda w: 'learn_skill' in w.events),
]
```

### Pacing controller (tension curve)
```python
class PacingController:
    def __init__(self):
        # 매 ideal 5-act curve
        self.target = lambda t: 4 * t * (1 - t) + 0.2 * np.sin(20 * t)
    
    def desired_tension(self, story_progress):
        return self.target(story_progress)  # 매 0 to 1
    
    def adjust(self, current_tension, story_progress):
        target = self.desired_tension(story_progress)
        if current_tension < target - 0.1:
            return 'introduce_conflict'
        elif current_tension > target + 0.1:
            return 'introduce_calm'
        return 'maintain'
```

### Beat-based (Mateas-style)
```python
class Beat:
    def __init__(self, name, preconditions, characters, duration):
        self.name = name
        self.preconditions = preconditions
        self.characters = characters
        self.duration = duration
    
    def can_fire(self, world):
        return all(c(world) for c in self.preconditions)

class DramaManager:
    def __init__(self, beats):
        self.beats = beats
        self.active_beat = None
    
    def select_beat(self, world):
        candidates = [b for b in self.beats if b.can_fire(world)]
        # 매 score by drama value
        return max(candidates, key=lambda b: b.drama_score(world))
```

### Search-based (declarative author intent)
```python
import heapq

def best_first_search(state, author_intent, max_depth=10):
    """매 plot search 의 author 의 maximize."""
    queue = [(0, state, [])]
    while queue:
        score, s, path = heapq.heappop(queue)
        if author_intent.satisfied(s) or len(path) >= max_depth:
            return path
        for action in s.legal_actions():
            new_s = s.apply(action)
            new_score = -author_intent.evaluate(new_s)
            heapq.heappush(queue, (new_score, new_s, path + [action]))
    return None
```

### LLM-based dynamic story
```python
def llm_drama_step(world_state, history, author_intent):
    prompt = f"""You are a drama manager. Author intent: "{author_intent}"

Recent history:
{format_history(history[-5:])}

World state: {world_state}

Output the next narrative beat that:
1. Honors player choice (do NOT railroad)
2. Moves toward author intent
3. Maintains pacing (current tension: {tension})
4. Stays consistent with character traits

Beat (JSON): {{ "type": "...", "description": "...", "characters": [...], "consequences": {{...}} }}"""
    return llm.generate(prompt)
```

### Coherence guardian
```python
class CoherenceCheck:
    def __init__(self, kb):
        self.kb = kb  # 매 character traits, world facts
    
    def validate(self, beat):
        contradictions = []
        for fact in self.kb.facts:
            if beat.contradicts(fact):
                contradictions.append((beat, fact))
        return contradictions

    def auto_fix(self, beat):
        # 매 LLM 의 use 의 reword
        contras = self.validate(beat)
        if contras:
            return llm.fix_contradictions(beat, contras)
        return beat
```

### Inkle ink-style (declarative narrative)
```ink
=== meet_mentor ===
The old wizard turns. "You've come at last."
* [Bow] -> bow_branch
* [Question] -> question_branch
- -> learn_skill

=== bow_branch ===
You bow deeply. He nods.
~ respect += 1
-> learn_skill
```

### AI Director-style pacing (Valve)
```python
class L4DDirector:
    """매 Left 4 Dead pacing AI."""
    def __init__(self):
        self.intensity = 0  # 매 0-1
    
    def update(self, players):
        # 매 measure recent danger
        recent_damage = sum(p.recent_damage for p in players)
        recent_kills = sum(p.recent_kills for p in players)
        
        self.intensity = min(1, recent_damage / 100 + recent_kills / 20)
    
    def decide(self):
        if self.intensity > 0.7:
            return 'relaxation'  # 매 calm period
        elif self.intensity < 0.3:
            return 'build_up'  # 매 zombie wave
        return 'sustain'
```

### Player model integration
```python
def adapt_drama(player_history):
    """매 player preference 의 drama 의 tune."""
    if player_history.combat_seek_count > 10:
        return 'combat_heavy'
    if player_history.dialog_engagement > 5:
        return 'dialog_heavy'
    return 'balanced'
```

## 매 결정 기준
| 상황 | Approach |
|---|---|
| Linear story | Plot-point manager |
| Emergent | Beat + character authority |
| Action-paced | AI Director (Valve) |
| Branching narrative | Inkle / Yarn |
| Open-ended LLM | GPT + author constraint |
| Educational | Lesson-arc + scaffold |

**기본값**: 매 hybrid — 매 plot-point + character authority + LLM dialog + coherence guardian.

## 🔗 Graph
- 부모: [[Game-Design]] · [[Interactive-Narrative]]
- 응용: [[Dynamic Difficulty Adjustment (DDA)]]
- Adjacent: [[Generative-AI]] · [[Computational_Creativity|Computational-Creativity]]

## 🤖 LLM 활용
**언제**: 매 narrative game. 매 interactive fiction. 매 dynamic story.
**언제 X**: 매 strict scripted (no agency). 매 pure sim.

## ❌ 안티패턴
- **Railroad**: 매 player choice 의 fake.
- **No coherence check**: 매 contradiction story.
- **LLM-only**: 매 author intent 의 lose.
- **Static beat**: 매 player adaptation X.
- **Drama at all cost**: 매 player frustrate.

## 🧪 검증 / 중복
- Verified (Façade paper, Roberts/Riedl, Crawford).
- 신뢰도 A.

## 🕓 Changelog
| 날짜 | 변경 |
|---|---|
| 2026-04-20 | Auto-reinforced |
| 2026-05-08 | Phase 1 |
| 2026-05-10 | Manual cleanup — DM architectures + 매 plot point / pacing / beat / LLM / Inkle code |